I feed Rylie Natural Balance Small Breed Bites Limited Ingredient Diet: Potato & Duck Formula. I feed the LID version, and not the ultra premium, because it is grain free and my cat has allergies (so I want it to be okay if she ever accidentally gets into the puppy food). It chose it after a long debate with myself and research because it is grain free, limited ingredient, and high quality and is also lower protein than brands like Blue Buffalo and Acana. Bonus is that it is smaller sized pieces (around the size of cat food), which I've read is better for our little ones. Rylie is doing fantastic on it!
Dick Van Patten's Natural Balance Pet Foods :1
I know that the protein debate is alive and well, but I decided as an inexperienced owner that I didn't feel comfortable feeding my baby above the recommended percentage in YT for Dummies (see my old threads on food and you can see some of my self debate typed out :P).
Overall, I think you just need to do what works best for your baby. Yes, Iams and Purina and such are "terrible foods" and they are considered so because of their ingredients according to a lot of research. However, if that is what works for your baby I say go for it!
I had a cat when I was little that lived to be old and healthy despite the fact we fed her poor quality food. She was fine on it and did well. I can't do that with my current cat so that's when I actually looked into what was IN their food. I'd never feed those foods as a first resort now, but if they were what worked for my pet I'd be comfortable with it.